Seems this meme really bothers them:
www.insider.com
Alternative explanations seem to be:
1) woman had older brother, remnants of his DNA were in woman's mom's womb and absorbed
2) woman was pregnant with son, absorbed his DNA
The thing is... does that actually account for 60% of women having male DNA in their brain?
Statistically does this mean that 60% of women have either an older brother or a past pregnancy with a son?
Male microchimerism was found in 21% of a group of women who never had sons, for example, so does that mean 21% of women have an older brother?
Even if we haven't directly proven it comes from sex partners, it clearly has to come from SOMEWHERE, so if we look at what % these alternative explanations actually represent and the % of chimeras is MORE then this should mean that sex is the only remaining theory to explain the discrepancy.
It might be that sperm microchimerism is RARE and that it's much more likely to absorb male DNA if you had an older brother or if you had a son. I can accept that. But I don't like them pushing this idea it's disproven when they haven't even introduced comparisons to % of women who have older bros or % of women which carried a male fetus.
www.ncbi.nlm.nih.gov
It's obvious they're raging so hard against this, trying to soften the blow.
www.ncbi.nlm.nih.gov
..
www.ncbi.nlm.nih.gov
If you're a woman, you might have male DNA inside your body — here's why
Studies show that some women have male DNA inside their bodies — but it doesn't happen because of sex. A scientist told INSIDER why.
www.insider.com
Alternative explanations seem to be:
1) woman had older brother, remnants of his DNA were in woman's mom's womb and absorbed
2) woman was pregnant with son, absorbed his DNA
The thing is... does that actually account for 60% of women having male DNA in their brain?
Statistically does this mean that 60% of women have either an older brother or a past pregnancy with a son?
Male microchimerism was found in 21% of a group of women who never had sons, for example, so does that mean 21% of women have an older brother?
Even if we haven't directly proven it comes from sex partners, it clearly has to come from SOMEWHERE, so if we look at what % these alternative explanations actually represent and the % of chimeras is MORE then this should mean that sex is the only remaining theory to explain the discrepancy.
It might be that sperm microchimerism is RARE and that it's much more likely to absorb male DNA if you had an older brother or if you had a son. I can accept that. But I don't like them pushing this idea it's disproven when they haven't even introduced comparisons to % of women who have older bros or % of women which carried a male fetus.
We are all born as microchimera
It is well accepted that pregnancy establishes microchimerism. Lately, transmaternal passage of cells from elder siblings has been suggested as possible source of non-fetal microchimerism in nulliparous women. Recently, we identified both non-maternal ...
www.ncbi.nlm.nih.gov
It's obvious they're raging so hard against this, trying to soften the blow.
T lymphocytes and macrophages, but not motile spermatozoa, are a significant source of human immunodeficiency virus in semen - PubMed
The cellular fraction of semen contains spermatozoa, immature germ cells, leukocytes, and epithelial cells. Recent evidence implicates seminal cells as a major source of sexually transmitted human immunodeficiency virus (HIV) in semen, but the identity and infectious potential of infected cells...
www.ncbi.nlm.nih.gov
Cross-presentation of male seminal fluid antigens elicits T cell activation to initiate the female immune response to pregnancy - PubMed
The events that generate T cell-mediated immune tolerance in early pregnancy are ill-defined. To investigate the significance of seminal fluid Ags in activating maternal T cells, and define the underlying Ag presentation pathways, OVA-specific T cells were adoptively transferred to female mice...
www.ncbi.nlm.nih.gov
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